# US 10,501,645 B2 · Semiconductive shield composition

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- Number: US 10,501,645 B2
- Document ID: US10501645B2
- Status: Granted
- Kind: B2
- Application number: 15/765,624
- Filed: 2016-09-29
- Published: 2018-10-18
- Granted: 2019-12-10
- Earliest claimed: 2015-10-07
- Assignees: Union Carbide Chemicals & Plastics Technology Corporation
- Applicants: Union Carbide Chemicals & Plastics Technology LLC
- Inventors: Paul J. Brigandi
- Web page: https://patentgrep.com/patent/US10501645B2

## CPC

- C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)}
- C08K 3/04: Carbon
- C08K 5/13: Phenols; Phenolates
- C08K 5/14: Peroxides
- C08L 9/02: Copolymers with acrylonitrile
- C08L 23/0853: Ethylene vinyl acetate copolymers
- C09D 5/086: {Organic or non-macromolecular compounds}
- C09D 5/20: for coatings strippable as coherent films, e.g. temporary coatings strippable as coherent films
- C09D 123/0853: {Vinylacetate}
- H01B 3/28: natural or synthetic rubbers
- H01B 3/441: {from alkenes}
- H01B 3/446: {from vinylacetals}
- H01B 9/027: {composed of semi-conducting layers}
- C08L 2203/202: use in electrical wires or wirecoating
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

A wire or cable comprising an insulation layer and a semiconducting shield layer over and in contact with the insulation layer and strippable from the insulation layer, the second semiconducting shield layer made from the composition comprising: (A) 45-52% ethylene vinyl acetate (EVA) comprising 28-45% units derived from vinyl acetate (VA) based on the weight of the EVA; (B) 30-45% carbon black having (1) 80-1 15 milliliters per 100 grams (ml/100 g) DBP absorption value, (2) 30-60 milligrams per gram (mg/g) iodine absorption (I2NO), and (3) 0.3-0.6 grams/milliliter (g/ml) apparent density; (C) 5-20% acrylonitrile butadiene rubber (NBR) comprising 25-55% units derived from acrylonitrile (AN) based on the weight of the NBR; (D) 0.2-2% phenolic antioxidant; and (E) 0.5-2% organic peroxide.

## Claims

### Claim 1

A composition consisting of in weight percent based on the weight of the composition:
(A) 45-52% ethylene vinyl acetate (EVA) comprising 31% units derived from vinyl acetate (VA) based on the weight of the EVA;
(B) 34-41% carbon black having
(1) 80-115 milliliters per 100 grams (ml/100 g) DBP absorption value,
(2) 30-60 milligrams per gram (mg/g) iodine absorption (I2NO), and
(3) 0.3-0.6 grams/milliliter (g/ml) apparent density;
(C) 8-19% acrylonitrile butadiene rubber (NBR) comprising 30-50% units derived from acrylonitrile (AN) based on the weight of the NBR;
(D) 0.4-1% phenolic antioxidant of 2,2′-methylenebis(6-tert-butyl-4-methylphenol);
(E) 0.7-1.4% organic peroxide; and
(F) optionally wax.

### Claim 2 (depends on 1)

The composition of claim 1 in which the organic peroxide is one or more of a dialkyl peroxide and a diperoxyketal.

### Claim 3 (depends on 1)

The composition of claim 1 further comprising one or more filler or additive.

### Claim 4 (depends on 1)

A wire or cable comprising an insulation layer and a semiconducting shield layer over and in contact with the insulation layer, the shield layer made from the composition of claim 1.

### Claim 5 (depends on 1)

A wire or cable comprising:
(A) a conductor;
(B) a first semiconducting shield layer over and in contact with the conductor;
(C) an insulation layer over and in contact with the first semiconducting shield layer;
(D) a second semiconducting shield layer over and in contact with the insulation layer, the second semiconducting shield layer made from the composition of claim 1;
(E) a wire shield over the second semiconducting shield layer; and
a protective jacket.

### Claim 6 (depends on 4)

The wire or cable of claim 4 which the insulation layer comprises a crosslinked polyolefin.

### Claim 7 (depends on 4)

The wire or cable of claim 4 which the insulation layer comprises a crosslinked ethylene-propylene-diene monomer rubber.

### Claim 8 (depends on 5)

The wire or cable of claim 5 which the insulation layer comprises a crosslinked polyolefin.

### Claim 9 (depends on 5)

The wire or cable of claim 5 which the insulation layer comprises a crosslinked ethylene-propylene-diene monomer rubber.

### Claim 10 (depends on 9)

The composition of claim 9 wherein the composition has a moving die rheometer value from 5.71 inch-pound to 6.46 inch-pound as measured in accordance with ASTM D 5289 at 182° C. for 12 minutes.

### Claim 11 (depends on 10)

The composition of claim 10 wherein the composition has a strip force from 13.8 pounds per half-inch to 19.5 pounds per half-inch.

### Claim 12

A composition consisting of in weight percent based on the weight of the composition:
(A) 45-52% ethylene vinyl acetate (EVA) comprising 40% units derived from vinyl acetate (VA) based on the weight of the EVA;
(B) 34-41% carbon black having
(1) 80-115 milliliters per 100 grams (ml/100 g) DBP absorption value,
(2) 30-60 milligrams per gram (mg/g) iodine absorption (I2NO), and
(3) 0.3-0.6 grams/milliliter (g/ml) apparent density;
(C) 8-19% acrylonitrile butadiene rubber (NBR) comprising 30-50% units derived from acrylonitrile (AN) based on the weight of the NBR;
(D) 0.4-1% phenolic antioxidant of 2,2′-methylenebis(6-tert-butyl-4-methylphenol); and
(E) 0.7-1.4% organic peroxide; and
(F) optionally wax.

### Claim 13 (depends on 12)

The composition of claim 12 wherein the composition has a moving die rheometer value from 4.64 inch-pound to 6.38 inch-pound as measured in accordance with ASTM D 5289 at 182° C. for 12 minutes.

### Claim 14 (depends on 13)

The composition of claim 13 wherein the composition has a strip force from 5.4 pounds per half-inch to 6.9 pounds per half-inch.